./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:01:20,523 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:01:20,664 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:01:20,675 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:01:20,676 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:01:20,731 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:01:20,734 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:01:20,734 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:01:20,735 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:01:20,741 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:01:20,742 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:01:20,743 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:01:20,743 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:01:20,745 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:01:20,746 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:01:20,746 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:01:20,747 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:01:20,747 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:01:20,748 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:01:20,748 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:01:20,748 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:01:20,749 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:01:20,750 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:01:20,750 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:01:20,750 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:01:20,751 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:01:20,752 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:01:20,752 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:01:20,754 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:01:20,755 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:01:20,756 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:01:20,757 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:01:20,757 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:01:20,757 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:01:20,757 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:01:20,758 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:01:20,758 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:01:20,758 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:01:20,758 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:01:20,759 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 [2023-11-19 08:01:21,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:01:21,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:01:21,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:01:21,150 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:01:21,150 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:01:21,152 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-19 08:01:24,213 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:01:24,477 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:01:24,478 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-19 08:01:24,488 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/data/01b2f8c6a/7237d3795e324e42aa8ac0c50c3ad410/FLAG7c152cf29 [2023-11-19 08:01:24,505 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/data/01b2f8c6a/7237d3795e324e42aa8ac0c50c3ad410 [2023-11-19 08:01:24,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:01:24,515 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:01:24,519 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:01:24,520 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:01:24,525 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:01:24,526 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:24" (1/1) ... [2023-11-19 08:01:24,527 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e13ac5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:24, skipping insertion in model container [2023-11-19 08:01:24,528 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:24" (1/1) ... [2023-11-19 08:01:24,556 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:01:24,763 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2124,2137] [2023-11-19 08:01:24,768 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:01:24,779 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:01:24,801 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2124,2137] [2023-11-19 08:01:24,802 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:01:24,810 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:01:24,811 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:01:24,817 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:01:24,817 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:24 WrapperNode [2023-11-19 08:01:24,818 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:01:24,819 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:01:24,819 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:01:24,819 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:01:24,828 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:24" (1/1) ... [2023-11-19 08:01:24,836 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:24" (1/1) ... [2023-11-19 08:01:24,857 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 58 [2023-11-19 08:01:24,858 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:01:24,859 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:01:24,859 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:01:24,859 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:01:24,868 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:24" (1/1) ... [2023-11-19 08:01:24,868 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:24" (1/1) ... [2023-11-19 08:01:24,870 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:24" (1/1) ... [2023-11-19 08:01:24,871 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:24" (1/1) ... [2023-11-19 08:01:24,877 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:24" (1/1) ... [2023-11-19 08:01:24,880 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:24" (1/1) ... [2023-11-19 08:01:24,882 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:24" (1/1) ... [2023-11-19 08:01:24,883 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:24" (1/1) ... [2023-11-19 08:01:24,886 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:01:24,887 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:01:24,887 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:01:24,888 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:01:24,889 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:24" (1/1) ... [2023-11-19 08:01:24,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:01:24,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:24,927 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:01:24,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:01:24,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:01:24,979 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 08:01:24,980 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 08:01:24,980 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 08:01:24,980 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 08:01:24,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:01:24,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:01:24,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:01:24,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 08:01:24,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 08:01:24,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:01:24,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:01:24,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:01:24,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:01:24,987 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:01:25,164 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:01:25,166 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:01:25,359 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:01:25,438 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:01:25,438 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 08:01:25,448 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:25 BoogieIcfgContainer [2023-11-19 08:01:25,448 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:01:25,451 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:01:25,452 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:01:25,455 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:01:25,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:01:24" (1/3) ... [2023-11-19 08:01:25,456 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a83e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:25, skipping insertion in model container [2023-11-19 08:01:25,456 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:24" (2/3) ... [2023-11-19 08:01:25,457 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a83e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:25, skipping insertion in model container [2023-11-19 08:01:25,458 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:25" (3/3) ... [2023-11-19 08:01:25,459 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-11-19 08:01:25,468 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 08:01:25,481 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:01:25,482 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:01:25,482 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:01:25,587 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 08:01:25,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 188 flow [2023-11-19 08:01:25,748 INFO L124 PetriNetUnfolderBase]: 6/85 cut-off events. [2023-11-19 08:01:25,748 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:01:25,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 50 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-11-19 08:01:25,760 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 188 flow [2023-11-19 08:01:25,765 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2023-11-19 08:01:25,781 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:01:25,795 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 76 transitions, 164 flow [2023-11-19 08:01:25,798 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 76 transitions, 164 flow [2023-11-19 08:01:25,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 164 flow [2023-11-19 08:01:25,826 INFO L124 PetriNetUnfolderBase]: 6/76 cut-off events. [2023-11-19 08:01:25,826 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:01:25,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 76 events. 6/76 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 49 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-11-19 08:01:25,829 INFO L119 LiptonReduction]: Number of co-enabled transitions 504 [2023-11-19 08:01:29,301 INFO L134 LiptonReduction]: Checked pairs total: 545 [2023-11-19 08:01:29,301 INFO L136 LiptonReduction]: Total number of compositions: 76 [2023-11-19 08:01:29,317 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:01:29,323 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4c1d5f9b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:01:29,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 08:01:29,330 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:01:29,330 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-19 08:01:29,331 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:01:29,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:29,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:29,332 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:01:29,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:29,337 INFO L85 PathProgramCache]: Analyzing trace with hash 833806254, now seen corresponding path program 1 times [2023-11-19 08:01:29,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:29,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388303956] [2023-11-19 08:01:29,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:29,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:29,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:29,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388303956] [2023-11-19 08:01:29,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388303956] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:29,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:29,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:01:29,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438742320] [2023-11-19 08:01:29,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:29,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:01:29,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:29,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:01:29,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:01:29,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 163 [2023-11-19 08:01:29,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:29,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:29,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 163 [2023-11-19 08:01:29,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:29,890 INFO L124 PetriNetUnfolderBase]: 51/92 cut-off events. [2023-11-19 08:01:29,890 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-19 08:01:29,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 92 events. 51/92 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 182 event pairs, 24 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 150. Up to 73 conditions per place. [2023-11-19 08:01:29,893 INFO L140 encePairwiseOnDemand]: 159/163 looper letters, 19 selfloop transitions, 3 changer transitions 0/22 dead transitions. [2023-11-19 08:01:29,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 22 transitions, 103 flow [2023-11-19 08:01:29,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:01:29,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:01:29,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 311 transitions. [2023-11-19 08:01:29,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47699386503067487 [2023-11-19 08:01:29,910 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 311 transitions. [2023-11-19 08:01:29,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 311 transitions. [2023-11-19 08:01:29,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:29,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 311 transitions. [2023-11-19 08:01:29,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:29,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:29,925 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:29,927 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 311 transitions. [2023-11-19 08:01:29,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 22 transitions, 103 flow [2023-11-19 08:01:29,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 22 transitions, 93 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 08:01:29,932 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-11-19 08:01:29,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-11-19 08:01:29,938 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-11-19 08:01:29,938 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-11-19 08:01:29,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:29,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:29,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:29,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:01:29,940 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:01:29,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:29,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1712653140, now seen corresponding path program 1 times [2023-11-19 08:01:29,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:29,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545284240] [2023-11-19 08:01:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:29,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:01:30,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:30,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545284240] [2023-11-19 08:01:30,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545284240] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:30,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:30,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:01:30,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994395896] [2023-11-19 08:01:30,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:30,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:01:30,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:30,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:01:30,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:01:30,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 163 [2023-11-19 08:01:30,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:30,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:30,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 163 [2023-11-19 08:01:30,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:30,248 INFO L124 PetriNetUnfolderBase]: 65/116 cut-off events. [2023-11-19 08:01:30,248 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-19 08:01:30,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 116 events. 65/116 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 270 event pairs, 33 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 70. Up to 92 conditions per place. [2023-11-19 08:01:30,250 INFO L140 encePairwiseOnDemand]: 159/163 looper letters, 21 selfloop transitions, 3 changer transitions 0/24 dead transitions. [2023-11-19 08:01:30,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 24 transitions, 123 flow [2023-11-19 08:01:30,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:01:30,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:01:30,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 303 transitions. [2023-11-19 08:01:30,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4647239263803681 [2023-11-19 08:01:30,258 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 303 transitions. [2023-11-19 08:01:30,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 303 transitions. [2023-11-19 08:01:30,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:30,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 303 transitions. [2023-11-19 08:01:30,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 75.75) internal successors, (303), 4 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:30,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:30,267 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:30,267 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 4 states and 303 transitions. [2023-11-19 08:01:30,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 24 transitions, 123 flow [2023-11-19 08:01:30,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 24 transitions, 113 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-19 08:01:30,269 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 56 flow [2023-11-19 08:01:30,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-11-19 08:01:30,270 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2023-11-19 08:01:30,270 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 56 flow [2023-11-19 08:01:30,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:30,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:30,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:30,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:01:30,271 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:01:30,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:30,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1895985706, now seen corresponding path program 1 times [2023-11-19 08:01:30,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:30,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149859212] [2023-11-19 08:01:30,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:30,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:30,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:30,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:30,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149859212] [2023-11-19 08:01:30,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149859212] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:01:30,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366642210] [2023-11-19 08:01:30,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:30,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:30,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:30,690 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:30,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:01:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:30,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 08:01:30,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:31,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:31,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366642210] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:31,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:01:31,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-19 08:01:31,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669123753] [2023-11-19 08:01:31,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:31,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 08:01:31,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:31,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 08:01:31,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2023-11-19 08:01:32,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-19 08:01:32,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 56 flow. Second operand has 22 states, 22 states have (on average 64.86363636363636) internal successors, (1427), 22 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:32,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:32,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-19 08:01:32,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:33,244 INFO L124 PetriNetUnfolderBase]: 172/325 cut-off events. [2023-11-19 08:01:33,244 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2023-11-19 08:01:33,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 325 events. 172/325 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1239 event pairs, 12 based on Foata normal form. 2/253 useless extension candidates. Maximal degree in co-relation 262. Up to 111 conditions per place. [2023-11-19 08:01:33,255 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 67 selfloop transitions, 35 changer transitions 19/121 dead transitions. [2023-11-19 08:01:33,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 121 transitions, 610 flow [2023-11-19 08:01:33,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-19 08:01:33,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-19 08:01:33,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1378 transitions. [2023-11-19 08:01:33,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226993865030675 [2023-11-19 08:01:33,262 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1378 transitions. [2023-11-19 08:01:33,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1378 transitions. [2023-11-19 08:01:33,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:33,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1378 transitions. [2023-11-19 08:01:33,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 68.9) internal successors, (1378), 20 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:33,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 163.0) internal successors, (3423), 21 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:33,282 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 163.0) internal successors, (3423), 21 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:33,282 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 56 flow. Second operand 20 states and 1378 transitions. [2023-11-19 08:01:33,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 121 transitions, 610 flow [2023-11-19 08:01:33,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 121 transitions, 596 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-19 08:01:33,289 INFO L231 Difference]: Finished difference. Result has 44 places, 55 transitions, 300 flow [2023-11-19 08:01:33,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=300, PETRI_PLACES=44, PETRI_TRANSITIONS=55} [2023-11-19 08:01:33,291 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 24 predicate places. [2023-11-19 08:01:33,291 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 55 transitions, 300 flow [2023-11-19 08:01:33,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 64.86363636363636) internal successors, (1427), 22 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:33,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:33,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:33,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:33,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:33,509 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:01:33,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:33,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1798769560, now seen corresponding path program 2 times [2023-11-19 08:01:33,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:33,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045720207] [2023-11-19 08:01:33,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:33,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:33,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:33,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:33,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045720207] [2023-11-19 08:01:33,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045720207] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:01:33,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778255686] [2023-11-19 08:01:33,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:01:33,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:33,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:33,889 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:33,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:01:33,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:01:33,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:01:33,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 08:01:33,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:34,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:34,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778255686] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:34,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:01:34,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-19 08:01:34,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069729224] [2023-11-19 08:01:34,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:34,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 08:01:34,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:34,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 08:01:34,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2023-11-19 08:01:34,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-19 08:01:34,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 300 flow. Second operand has 22 states, 22 states have (on average 64.95454545454545) internal successors, (1429), 22 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:34,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:34,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-19 08:01:34,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:35,860 INFO L124 PetriNetUnfolderBase]: 180/363 cut-off events. [2023-11-19 08:01:35,860 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2023-11-19 08:01:35,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1272 conditions, 363 events. 180/363 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1516 event pairs, 27 based on Foata normal form. 2/333 useless extension candidates. Maximal degree in co-relation 1234. Up to 121 conditions per place. [2023-11-19 08:01:35,866 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 67 selfloop transitions, 30 changer transitions 29/126 dead transitions. [2023-11-19 08:01:35,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 126 transitions, 806 flow [2023-11-19 08:01:35,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-19 08:01:35,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-19 08:01:35,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1375 transitions. [2023-11-19 08:01:35,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217791411042945 [2023-11-19 08:01:35,879 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1375 transitions. [2023-11-19 08:01:35,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1375 transitions. [2023-11-19 08:01:35,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:35,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1375 transitions. [2023-11-19 08:01:35,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 68.75) internal successors, (1375), 20 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:35,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 163.0) internal successors, (3423), 21 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:35,898 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 163.0) internal successors, (3423), 21 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:35,899 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 300 flow. Second operand 20 states and 1375 transitions. [2023-11-19 08:01:35,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 126 transitions, 806 flow [2023-11-19 08:01:35,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 126 transitions, 722 flow, removed 36 selfloop flow, removed 4 redundant places. [2023-11-19 08:01:35,918 INFO L231 Difference]: Finished difference. Result has 62 places, 53 transitions, 315 flow [2023-11-19 08:01:35,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=315, PETRI_PLACES=62, PETRI_TRANSITIONS=53} [2023-11-19 08:01:35,920 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 42 predicate places. [2023-11-19 08:01:35,921 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 53 transitions, 315 flow [2023-11-19 08:01:35,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 64.95454545454545) internal successors, (1429), 22 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:35,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:35,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:35,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:36,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:36,136 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:01:36,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:36,136 INFO L85 PathProgramCache]: Analyzing trace with hash -29277608, now seen corresponding path program 3 times [2023-11-19 08:01:36,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:36,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571928326] [2023-11-19 08:01:36,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:36,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:36,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:36,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571928326] [2023-11-19 08:01:36,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571928326] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:01:36,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920049914] [2023-11-19 08:01:36,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:01:36,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:36,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:36,458 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:36,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:01:36,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 08:01:36,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:01:36,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 08:01:36,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:36,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:37,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920049914] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:37,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:01:37,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-19 08:01:37,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291388583] [2023-11-19 08:01:37,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:37,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 08:01:37,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:37,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 08:01:37,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2023-11-19 08:01:37,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-19 08:01:37,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 53 transitions, 315 flow. Second operand has 22 states, 22 states have (on average 64.86363636363636) internal successors, (1427), 22 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:37,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:37,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-19 08:01:37,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:38,298 INFO L124 PetriNetUnfolderBase]: 167/340 cut-off events. [2023-11-19 08:01:38,298 INFO L125 PetriNetUnfolderBase]: For 546/546 co-relation queries the response was YES. [2023-11-19 08:01:38,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1254 conditions, 340 events. 167/340 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1386 event pairs, 20 based on Foata normal form. 1/329 useless extension candidates. Maximal degree in co-relation 1205. Up to 135 conditions per place. [2023-11-19 08:01:38,302 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 64 selfloop transitions, 38 changer transitions 16/118 dead transitions. [2023-11-19 08:01:38,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 118 transitions, 810 flow [2023-11-19 08:01:38,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 08:01:38,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-19 08:01:38,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1237 transitions. [2023-11-19 08:01:38,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4216087252897069 [2023-11-19 08:01:38,308 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1237 transitions. [2023-11-19 08:01:38,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1237 transitions. [2023-11-19 08:01:38,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:38,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1237 transitions. [2023-11-19 08:01:38,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 68.72222222222223) internal successors, (1237), 18 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:38,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 163.0) internal successors, (3097), 19 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:38,320 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 163.0) internal successors, (3097), 19 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:38,320 INFO L175 Difference]: Start difference. First operand has 62 places, 53 transitions, 315 flow. Second operand 18 states and 1237 transitions. [2023-11-19 08:01:38,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 118 transitions, 810 flow [2023-11-19 08:01:38,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 118 transitions, 704 flow, removed 18 selfloop flow, removed 15 redundant places. [2023-11-19 08:01:38,328 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 389 flow [2023-11-19 08:01:38,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=389, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2023-11-19 08:01:38,329 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 42 predicate places. [2023-11-19 08:01:38,329 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 389 flow [2023-11-19 08:01:38,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 64.86363636363636) internal successors, (1427), 22 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:38,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:38,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:38,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:38,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:38,545 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:01:38,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:38,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1321856522, now seen corresponding path program 4 times [2023-11-19 08:01:38,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:38,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50198513] [2023-11-19 08:01:38,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:38,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:38,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:38,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50198513] [2023-11-19 08:01:38,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50198513] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:01:38,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449383590] [2023-11-19 08:01:38,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 08:01:38,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:38,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:38,644 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:38,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:01:38,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 08:01:38,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:01:38,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:01:38,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:38,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:38,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449383590] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:38,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:01:38,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-11-19 08:01:38,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656467502] [2023-11-19 08:01:38,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:38,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:01:38,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:38,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:01:38,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:01:38,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 163 [2023-11-19 08:01:38,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 389 flow. Second operand has 7 states, 7 states have (on average 73.57142857142857) internal successors, (515), 7 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:38,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:38,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 163 [2023-11-19 08:01:38,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:38,916 INFO L124 PetriNetUnfolderBase]: 160/306 cut-off events. [2023-11-19 08:01:38,916 INFO L125 PetriNetUnfolderBase]: For 524/524 co-relation queries the response was YES. [2023-11-19 08:01:38,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1128 conditions, 306 events. 160/306 cut-off events. For 524/524 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1103 event pairs, 25 based on Foata normal form. 18/310 useless extension candidates. Maximal degree in co-relation 1099. Up to 229 conditions per place. [2023-11-19 08:01:38,919 INFO L140 encePairwiseOnDemand]: 158/163 looper letters, 54 selfloop transitions, 12 changer transitions 1/67 dead transitions. [2023-11-19 08:01:38,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 67 transitions, 521 flow [2023-11-19 08:01:38,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:01:38,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:01:38,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 382 transitions. [2023-11-19 08:01:38,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4687116564417178 [2023-11-19 08:01:38,922 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 382 transitions. [2023-11-19 08:01:38,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 382 transitions. [2023-11-19 08:01:38,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:38,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 382 transitions. [2023-11-19 08:01:38,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 76.4) internal successors, (382), 5 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:38,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:38,926 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:38,927 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 389 flow. Second operand 5 states and 382 transitions. [2023-11-19 08:01:38,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 67 transitions, 521 flow [2023-11-19 08:01:38,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 67 transitions, 443 flow, removed 8 selfloop flow, removed 10 redundant places. [2023-11-19 08:01:38,934 INFO L231 Difference]: Finished difference. Result has 50 places, 55 transitions, 319 flow [2023-11-19 08:01:38,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=319, PETRI_PLACES=50, PETRI_TRANSITIONS=55} [2023-11-19 08:01:38,937 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-11-19 08:01:38,938 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 55 transitions, 319 flow [2023-11-19 08:01:38,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 73.57142857142857) internal successors, (515), 7 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:38,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:38,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:38,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:39,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 08:01:39,159 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:01:39,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:39,159 INFO L85 PathProgramCache]: Analyzing trace with hash 33384716, now seen corresponding path program 5 times [2023-11-19 08:01:39,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:39,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139568918] [2023-11-19 08:01:39,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:39,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:39,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:39,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139568918] [2023-11-19 08:01:39,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139568918] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:01:39,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882442231] [2023-11-19 08:01:39,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 08:01:39,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:39,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:39,419 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:39,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:01:39,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:01:39,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:01:39,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 08:01:39,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:39,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:40,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882442231] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:40,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:01:40,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-19 08:01:40,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311828553] [2023-11-19 08:01:40,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:40,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 08:01:40,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:40,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 08:01:40,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2023-11-19 08:01:40,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-19 08:01:40,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 55 transitions, 319 flow. Second operand has 22 states, 22 states have (on average 64.9090909090909) internal successors, (1428), 22 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:40,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:40,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-19 08:01:40,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:41,235 INFO L124 PetriNetUnfolderBase]: 229/457 cut-off events. [2023-11-19 08:01:41,235 INFO L125 PetriNetUnfolderBase]: For 735/735 co-relation queries the response was YES. [2023-11-19 08:01:41,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1673 conditions, 457 events. 229/457 cut-off events. For 735/735 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2022 event pairs, 26 based on Foata normal form. 3/432 useless extension candidates. Maximal degree in co-relation 1457. Up to 257 conditions per place. [2023-11-19 08:01:41,240 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 75 selfloop transitions, 36 changer transitions 24/135 dead transitions. [2023-11-19 08:01:41,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 135 transitions, 925 flow [2023-11-19 08:01:41,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 08:01:41,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-19 08:01:41,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1430 transitions. [2023-11-19 08:01:41,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4177621969033012 [2023-11-19 08:01:41,246 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1430 transitions. [2023-11-19 08:01:41,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1430 transitions. [2023-11-19 08:01:41,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:41,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1430 transitions. [2023-11-19 08:01:41,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 68.0952380952381) internal successors, (1430), 21 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:41,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 163.0) internal successors, (3586), 22 states have internal predecessors, (3586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:41,263 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 163.0) internal successors, (3586), 22 states have internal predecessors, (3586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:41,263 INFO L175 Difference]: Start difference. First operand has 50 places, 55 transitions, 319 flow. Second operand 21 states and 1430 transitions. [2023-11-19 08:01:41,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 135 transitions, 925 flow [2023-11-19 08:01:41,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 135 transitions, 885 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-11-19 08:01:41,272 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 539 flow [2023-11-19 08:01:41,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=539, PETRI_PLACES=78, PETRI_TRANSITIONS=73} [2023-11-19 08:01:41,274 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 58 predicate places. [2023-11-19 08:01:41,275 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 539 flow [2023-11-19 08:01:41,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 64.9090909090909) internal successors, (1428), 22 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:41,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:41,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:41,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:41,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 08:01:41,501 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:01:41,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:41,501 INFO L85 PathProgramCache]: Analyzing trace with hash 278152630, now seen corresponding path program 6 times [2023-11-19 08:01:41,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:41,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632075063] [2023-11-19 08:01:41,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:41,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:41,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:41,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632075063] [2023-11-19 08:01:41,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632075063] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:01:41,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948315833] [2023-11-19 08:01:41,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 08:01:41,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:41,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:41,817 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:41,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:01:41,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-19 08:01:41,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:01:41,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 08:01:41,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:42,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:42,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948315833] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:42,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:01:42,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-19 08:01:42,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163793068] [2023-11-19 08:01:42,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:42,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 08:01:42,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:42,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 08:01:42,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2023-11-19 08:01:42,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-19 08:01:42,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 73 transitions, 539 flow. Second operand has 22 states, 22 states have (on average 64.86363636363636) internal successors, (1427), 22 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:42,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:42,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-19 08:01:42,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:43,667 INFO L124 PetriNetUnfolderBase]: 211/411 cut-off events. [2023-11-19 08:01:43,668 INFO L125 PetriNetUnfolderBase]: For 1109/1109 co-relation queries the response was YES. [2023-11-19 08:01:43,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1724 conditions, 411 events. 211/411 cut-off events. For 1109/1109 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1697 event pairs, 28 based on Foata normal form. 1/390 useless extension candidates. Maximal degree in co-relation 1672. Up to 306 conditions per place. [2023-11-19 08:01:43,673 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 70 selfloop transitions, 22 changer transitions 16/108 dead transitions. [2023-11-19 08:01:43,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 108 transitions, 892 flow [2023-11-19 08:01:43,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 08:01:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-19 08:01:43,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 881 transitions. [2023-11-19 08:01:43,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415762151958471 [2023-11-19 08:01:43,679 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 881 transitions. [2023-11-19 08:01:43,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 881 transitions. [2023-11-19 08:01:43,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:43,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 881 transitions. [2023-11-19 08:01:43,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 67.76923076923077) internal successors, (881), 13 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:43,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 163.0) internal successors, (2282), 14 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:43,690 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 163.0) internal successors, (2282), 14 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:43,690 INFO L175 Difference]: Start difference. First operand has 78 places, 73 transitions, 539 flow. Second operand 13 states and 881 transitions. [2023-11-19 08:01:43,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 108 transitions, 892 flow [2023-11-19 08:01:43,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 108 transitions, 814 flow, removed 25 selfloop flow, removed 10 redundant places. [2023-11-19 08:01:43,704 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 536 flow [2023-11-19 08:01:43,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=536, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2023-11-19 08:01:43,705 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 58 predicate places. [2023-11-19 08:01:43,705 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 536 flow [2023-11-19 08:01:43,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 64.86363636363636) internal successors, (1427), 22 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:43,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:43,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:43,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:43,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:43,933 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:01:43,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:43,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1444091144, now seen corresponding path program 7 times [2023-11-19 08:01:43,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:43,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473579168] [2023-11-19 08:01:43,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:43,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:44,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:44,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473579168] [2023-11-19 08:01:44,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473579168] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:01:44,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652062603] [2023-11-19 08:01:44,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 08:01:44,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:44,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:44,267 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:44,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:01:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:44,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 08:01:44,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:44,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:45,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:45,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652062603] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:45,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:01:45,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-19 08:01:45,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59073792] [2023-11-19 08:01:45,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:45,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 08:01:45,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:45,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 08:01:45,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2023-11-19 08:01:45,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-19 08:01:45,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 536 flow. Second operand has 21 states, 21 states have (on average 64.76190476190476) internal successors, (1360), 21 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:45,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:45,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-19 08:01:45,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:46,080 INFO L124 PetriNetUnfolderBase]: 219/427 cut-off events. [2023-11-19 08:01:46,081 INFO L125 PetriNetUnfolderBase]: For 1018/1018 co-relation queries the response was YES. [2023-11-19 08:01:46,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1731 conditions, 427 events. 219/427 cut-off events. For 1018/1018 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1768 event pairs, 16 based on Foata normal form. 2/407 useless extension candidates. Maximal degree in co-relation 1690. Up to 265 conditions per place. [2023-11-19 08:01:46,086 INFO L140 encePairwiseOnDemand]: 154/163 looper letters, 81 selfloop transitions, 27 changer transitions 20/128 dead transitions. [2023-11-19 08:01:46,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 128 transitions, 1025 flow [2023-11-19 08:01:46,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 08:01:46,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 08:01:46,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 961 transitions. [2023-11-19 08:01:46,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42112182296231376 [2023-11-19 08:01:46,092 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 961 transitions. [2023-11-19 08:01:46,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 961 transitions. [2023-11-19 08:01:46,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:46,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 961 transitions. [2023-11-19 08:01:46,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 68.64285714285714) internal successors, (961), 14 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:46,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 163.0) internal successors, (2445), 15 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:46,103 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 163.0) internal successors, (2445), 15 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:46,103 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 536 flow. Second operand 14 states and 961 transitions. [2023-11-19 08:01:46,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 128 transitions, 1025 flow [2023-11-19 08:01:46,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 128 transitions, 959 flow, removed 15 selfloop flow, removed 7 redundant places. [2023-11-19 08:01:46,117 INFO L231 Difference]: Finished difference. Result has 89 places, 79 transitions, 609 flow [2023-11-19 08:01:46,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=609, PETRI_PLACES=89, PETRI_TRANSITIONS=79} [2023-11-19 08:01:46,118 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 69 predicate places. [2023-11-19 08:01:46,118 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 79 transitions, 609 flow [2023-11-19 08:01:46,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.76190476190476) internal successors, (1360), 21 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:46,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:46,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:46,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:46,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:46,333 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:01:46,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:46,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1338039880, now seen corresponding path program 8 times [2023-11-19 08:01:46,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:46,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145072259] [2023-11-19 08:01:46,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:46,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:46,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:46,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:46,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145072259] [2023-11-19 08:01:46,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145072259] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:01:46,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712224902] [2023-11-19 08:01:46,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:01:46,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:46,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:46,646 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:46,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:01:46,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:01:46,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:01:46,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 08:01:46,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:46,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:47,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712224902] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:47,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:01:47,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-19 08:01:47,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572472679] [2023-11-19 08:01:47,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:47,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 08:01:47,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:47,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 08:01:47,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2023-11-19 08:01:47,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-19 08:01:47,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 79 transitions, 609 flow. Second operand has 22 states, 22 states have (on average 64.86363636363636) internal successors, (1427), 22 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:47,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:47,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-19 08:01:47,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:48,163 INFO L124 PetriNetUnfolderBase]: 191/361 cut-off events. [2023-11-19 08:01:48,163 INFO L125 PetriNetUnfolderBase]: For 898/898 co-relation queries the response was YES. [2023-11-19 08:01:48,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1569 conditions, 361 events. 191/361 cut-off events. For 898/898 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1337 event pairs, 14 based on Foata normal form. 1/362 useless extension candidates. Maximal degree in co-relation 1521. Up to 266 conditions per place. [2023-11-19 08:01:48,169 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 74 selfloop transitions, 25 changer transitions 9/108 dead transitions. [2023-11-19 08:01:48,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 108 transitions, 935 flow [2023-11-19 08:01:48,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 08:01:48,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-19 08:01:48,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 877 transitions. [2023-11-19 08:01:48,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413874469089193 [2023-11-19 08:01:48,173 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 877 transitions. [2023-11-19 08:01:48,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 877 transitions. [2023-11-19 08:01:48,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:48,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 877 transitions. [2023-11-19 08:01:48,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 67.46153846153847) internal successors, (877), 13 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:48,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 163.0) internal successors, (2282), 14 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:48,183 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 163.0) internal successors, (2282), 14 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:48,183 INFO L175 Difference]: Start difference. First operand has 89 places, 79 transitions, 609 flow. Second operand 13 states and 877 transitions. [2023-11-19 08:01:48,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 108 transitions, 935 flow [2023-11-19 08:01:48,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 108 transitions, 848 flow, removed 19 selfloop flow, removed 13 redundant places. [2023-11-19 08:01:48,195 INFO L231 Difference]: Finished difference. Result has 85 places, 80 transitions, 605 flow [2023-11-19 08:01:48,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=605, PETRI_PLACES=85, PETRI_TRANSITIONS=80} [2023-11-19 08:01:48,197 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 65 predicate places. [2023-11-19 08:01:48,197 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 80 transitions, 605 flow [2023-11-19 08:01:48,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 64.86363636363636) internal successors, (1427), 22 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:48,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:48,198 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:48,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:48,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 08:01:48,413 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:01:48,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:48,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1463662288, now seen corresponding path program 9 times [2023-11-19 08:01:48,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:48,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509781446] [2023-11-19 08:01:48,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:48,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:48,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:48,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509781446] [2023-11-19 08:01:48,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509781446] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:01:48,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052634738] [2023-11-19 08:01:48,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:01:48,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:48,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:48,651 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:48,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:01:48,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 08:01:48,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:01:48,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 08:01:48,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:48,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:49,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:49,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052634738] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:49,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:01:49,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-19 08:01:49,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806165286] [2023-11-19 08:01:49,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:49,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 08:01:49,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:49,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 08:01:49,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2023-11-19 08:01:49,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-19 08:01:49,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 80 transitions, 605 flow. Second operand has 25 states, 25 states have (on average 64.8) internal successors, (1620), 25 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:49,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:49,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-19 08:01:49,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:51,288 INFO L124 PetriNetUnfolderBase]: 275/537 cut-off events. [2023-11-19 08:01:51,288 INFO L125 PetriNetUnfolderBase]: For 1826/1826 co-relation queries the response was YES. [2023-11-19 08:01:51,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2367 conditions, 537 events. 275/537 cut-off events. For 1826/1826 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2420 event pairs, 14 based on Foata normal form. 3/540 useless extension candidates. Maximal degree in co-relation 2322. Up to 203 conditions per place. [2023-11-19 08:01:51,296 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 98 selfloop transitions, 86 changer transitions 20/204 dead transitions. [2023-11-19 08:01:51,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 204 transitions, 1619 flow [2023-11-19 08:01:51,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-19 08:01:51,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-19 08:01:51,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2052 transitions. [2023-11-19 08:01:51,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4196319018404908 [2023-11-19 08:01:51,334 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2052 transitions. [2023-11-19 08:01:51,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2052 transitions. [2023-11-19 08:01:51,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:51,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2052 transitions. [2023-11-19 08:01:51,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 68.4) internal successors, (2052), 30 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:51,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 163.0) internal successors, (5053), 31 states have internal predecessors, (5053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:51,370 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 163.0) internal successors, (5053), 31 states have internal predecessors, (5053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:51,379 INFO L175 Difference]: Start difference. First operand has 85 places, 80 transitions, 605 flow. Second operand 30 states and 2052 transitions. [2023-11-19 08:01:51,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 204 transitions, 1619 flow [2023-11-19 08:01:51,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 204 transitions, 1522 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-11-19 08:01:51,399 INFO L231 Difference]: Finished difference. Result has 107 places, 109 transitions, 954 flow [2023-11-19 08:01:51,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=954, PETRI_PLACES=107, PETRI_TRANSITIONS=109} [2023-11-19 08:01:51,404 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 87 predicate places. [2023-11-19 08:01:51,404 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 109 transitions, 954 flow [2023-11-19 08:01:51,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 64.8) internal successors, (1620), 25 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:51,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:51,416 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:51,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:51,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 08:01:51,629 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:01:51,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:51,630 INFO L85 PathProgramCache]: Analyzing trace with hash -898441734, now seen corresponding path program 10 times [2023-11-19 08:01:51,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:51,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274434595] [2023-11-19 08:01:51,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:51,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:51,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:51,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274434595] [2023-11-19 08:01:51,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274434595] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:01:51,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294473192] [2023-11-19 08:01:51,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 08:01:51,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:51,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:51,954 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:51,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 08:01:52,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 08:01:52,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:01:52,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 08:01:52,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:52,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:52,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294473192] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:52,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:01:52,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-19 08:01:52,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401297117] [2023-11-19 08:01:52,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:52,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 08:01:52,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:52,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 08:01:52,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-11-19 08:01:53,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-19 08:01:53,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 109 transitions, 954 flow. Second operand has 25 states, 25 states have (on average 64.76) internal successors, (1619), 25 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:53,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:53,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-19 08:01:53,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:55,393 INFO L124 PetriNetUnfolderBase]: 346/696 cut-off events. [2023-11-19 08:01:55,393 INFO L125 PetriNetUnfolderBase]: For 4193/4193 co-relation queries the response was YES. [2023-11-19 08:01:55,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3554 conditions, 696 events. 346/696 cut-off events. For 4193/4193 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3531 event pairs, 16 based on Foata normal form. 3/699 useless extension candidates. Maximal degree in co-relation 3480. Up to 273 conditions per place. [2023-11-19 08:01:55,406 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 121 selfloop transitions, 104 changer transitions 15/240 dead transitions. [2023-11-19 08:01:55,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 240 transitions, 2139 flow [2023-11-19 08:01:55,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-19 08:01:55,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-19 08:01:55,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2449 transitions. [2023-11-19 08:01:55,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.417348329925017 [2023-11-19 08:01:55,416 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2449 transitions. [2023-11-19 08:01:55,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2449 transitions. [2023-11-19 08:01:55,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:55,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2449 transitions. [2023-11-19 08:01:55,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 68.02777777777777) internal successors, (2449), 36 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:55,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 163.0) internal successors, (6031), 37 states have internal predecessors, (6031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:55,441 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 163.0) internal successors, (6031), 37 states have internal predecessors, (6031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:55,441 INFO L175 Difference]: Start difference. First operand has 107 places, 109 transitions, 954 flow. Second operand 36 states and 2449 transitions. [2023-11-19 08:01:55,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 240 transitions, 2139 flow [2023-11-19 08:01:55,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 240 transitions, 1770 flow, removed 152 selfloop flow, removed 12 redundant places. [2023-11-19 08:01:55,478 INFO L231 Difference]: Finished difference. Result has 136 places, 138 transitions, 1301 flow [2023-11-19 08:01:55,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1301, PETRI_PLACES=136, PETRI_TRANSITIONS=138} [2023-11-19 08:01:55,482 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 116 predicate places. [2023-11-19 08:01:55,482 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 138 transitions, 1301 flow [2023-11-19 08:01:55,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 64.76) internal successors, (1619), 25 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:55,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:55,483 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:55,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:55,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 08:01:55,696 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:01:55,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:55,697 INFO L85 PathProgramCache]: Analyzing trace with hash -975273684, now seen corresponding path program 11 times [2023-11-19 08:01:55,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:55,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478757158] [2023-11-19 08:01:55,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:55,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:56,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:56,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478757158] [2023-11-19 08:01:56,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478757158] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:01:56,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804345156] [2023-11-19 08:01:56,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 08:01:56,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:56,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:56,082 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:56,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 08:01:56,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:01:56,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:01:56,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 08:01:56,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:56,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:57,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804345156] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:57,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:01:57,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-19 08:01:57,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910277468] [2023-11-19 08:01:57,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:57,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 08:01:57,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:57,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 08:01:57,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-11-19 08:01:57,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-19 08:01:57,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 138 transitions, 1301 flow. Second operand has 25 states, 25 states have (on average 64.84) internal successors, (1621), 25 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:57,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:57,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-19 08:01:57,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:59,479 INFO L124 PetriNetUnfolderBase]: 363/732 cut-off events. [2023-11-19 08:01:59,479 INFO L125 PetriNetUnfolderBase]: For 4710/4710 co-relation queries the response was YES. [2023-11-19 08:01:59,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3786 conditions, 732 events. 363/732 cut-off events. For 4710/4710 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3781 event pairs, 20 based on Foata normal form. 4/734 useless extension candidates. Maximal degree in co-relation 3700. Up to 261 conditions per place. [2023-11-19 08:01:59,491 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 120 selfloop transitions, 104 changer transitions 26/250 dead transitions. [2023-11-19 08:01:59,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 250 transitions, 2305 flow [2023-11-19 08:01:59,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-19 08:01:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-19 08:01:59,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2334 transitions. [2023-11-19 08:01:59,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4211476001443522 [2023-11-19 08:01:59,502 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2334 transitions. [2023-11-19 08:01:59,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2334 transitions. [2023-11-19 08:01:59,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:59,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2334 transitions. [2023-11-19 08:01:59,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 68.6470588235294) internal successors, (2334), 34 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:59,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 163.0) internal successors, (5705), 35 states have internal predecessors, (5705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:59,522 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 163.0) internal successors, (5705), 35 states have internal predecessors, (5705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:59,523 INFO L175 Difference]: Start difference. First operand has 136 places, 138 transitions, 1301 flow. Second operand 34 states and 2334 transitions. [2023-11-19 08:01:59,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 250 transitions, 2305 flow [2023-11-19 08:01:59,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 250 transitions, 1901 flow, removed 162 selfloop flow, removed 17 redundant places. [2023-11-19 08:01:59,574 INFO L231 Difference]: Finished difference. Result has 155 places, 139 transitions, 1278 flow [2023-11-19 08:01:59,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1278, PETRI_PLACES=155, PETRI_TRANSITIONS=139} [2023-11-19 08:01:59,576 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 135 predicate places. [2023-11-19 08:01:59,576 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 139 transitions, 1278 flow [2023-11-19 08:01:59,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 64.84) internal successors, (1621), 25 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:59,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:59,578 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:59,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:59,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 08:01:59,792 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:01:59,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:59,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1012507738, now seen corresponding path program 12 times [2023-11-19 08:01:59,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:59,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536783990] [2023-11-19 08:01:59,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:59,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:00,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:00,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536783990] [2023-11-19 08:02:00,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536783990] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:00,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720819357] [2023-11-19 08:02:00,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 08:02:00,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:00,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:00,148 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:00,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 08:02:00,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-19 08:02:00,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:02:00,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 08:02:00,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:00,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:01,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720819357] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:01,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:02:01,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-19 08:02:01,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033640384] [2023-11-19 08:02:01,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:01,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 08:02:01,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:01,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 08:02:01,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-11-19 08:02:01,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-19 08:02:01,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 139 transitions, 1278 flow. Second operand has 25 states, 25 states have (on average 64.84) internal successors, (1621), 25 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:01,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:01,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-19 08:02:01,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:02,923 INFO L124 PetriNetUnfolderBase]: 365/742 cut-off events. [2023-11-19 08:02:02,923 INFO L125 PetriNetUnfolderBase]: For 2120/2120 co-relation queries the response was YES. [2023-11-19 08:02:02,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3492 conditions, 742 events. 365/742 cut-off events. For 2120/2120 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3833 event pairs, 28 based on Foata normal form. 3/743 useless extension candidates. Maximal degree in co-relation 3391. Up to 326 conditions per place. [2023-11-19 08:02:02,933 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 113 selfloop transitions, 90 changer transitions 20/223 dead transitions. [2023-11-19 08:02:02,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 223 transitions, 2035 flow [2023-11-19 08:02:02,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-19 08:02:02,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-19 08:02:02,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1979 transitions. [2023-11-19 08:02:02,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41865876877512165 [2023-11-19 08:02:02,976 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1979 transitions. [2023-11-19 08:02:02,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1979 transitions. [2023-11-19 08:02:02,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:02,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1979 transitions. [2023-11-19 08:02:02,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 68.24137931034483) internal successors, (1979), 29 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:02,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 163.0) internal successors, (4890), 30 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:02,994 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 163.0) internal successors, (4890), 30 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:02,994 INFO L175 Difference]: Start difference. First operand has 155 places, 139 transitions, 1278 flow. Second operand 29 states and 1979 transitions. [2023-11-19 08:02:02,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 223 transitions, 2035 flow [2023-11-19 08:02:03,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 223 transitions, 1827 flow, removed 19 selfloop flow, removed 24 redundant places. [2023-11-19 08:02:03,017 INFO L231 Difference]: Finished difference. Result has 157 places, 138 transitions, 1297 flow [2023-11-19 08:02:03,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1297, PETRI_PLACES=157, PETRI_TRANSITIONS=138} [2023-11-19 08:02:03,018 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 137 predicate places. [2023-11-19 08:02:03,018 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 138 transitions, 1297 flow [2023-11-19 08:02:03,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 64.84) internal successors, (1621), 25 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:03,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:03,019 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:03,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:03,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 08:02:03,233 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:02:03,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:03,234 INFO L85 PathProgramCache]: Analyzing trace with hash 382829244, now seen corresponding path program 13 times [2023-11-19 08:02:03,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:03,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312178644] [2023-11-19 08:02:03,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:03,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:03,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:03,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:03,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312178644] [2023-11-19 08:02:03,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312178644] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:03,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589232367] [2023-11-19 08:02:03,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 08:02:03,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:03,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:03,499 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:03,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 08:02:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:03,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 08:02:03,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:03,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:04,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589232367] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:04,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:02:04,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-19 08:02:04,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091576069] [2023-11-19 08:02:04,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:04,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 08:02:04,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:04,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 08:02:04,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2023-11-19 08:02:04,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-19 08:02:04,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 138 transitions, 1297 flow. Second operand has 25 states, 25 states have (on average 64.76) internal successors, (1619), 25 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:04,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:04,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-19 08:02:04,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:06,774 INFO L124 PetriNetUnfolderBase]: 523/1059 cut-off events. [2023-11-19 08:02:06,774 INFO L125 PetriNetUnfolderBase]: For 4113/4113 co-relation queries the response was YES. [2023-11-19 08:02:06,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5171 conditions, 1059 events. 523/1059 cut-off events. For 4113/4113 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6028 event pairs, 66 based on Foata normal form. 6/1059 useless extension candidates. Maximal degree in co-relation 5037. Up to 463 conditions per place. [2023-11-19 08:02:06,787 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 158 selfloop transitions, 132 changer transitions 40/330 dead transitions. [2023-11-19 08:02:06,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 330 transitions, 3158 flow [2023-11-19 08:02:06,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-19 08:02:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-19 08:02:06,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3319 transitions. [2023-11-19 08:02:06,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155502691874296 [2023-11-19 08:02:06,796 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3319 transitions. [2023-11-19 08:02:06,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3319 transitions. [2023-11-19 08:02:06,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:06,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3319 transitions. [2023-11-19 08:02:06,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 67.73469387755102) internal successors, (3319), 49 states have internal predecessors, (3319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:06,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 163.0) internal successors, (8150), 50 states have internal predecessors, (8150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:06,821 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 163.0) internal successors, (8150), 50 states have internal predecessors, (8150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:06,821 INFO L175 Difference]: Start difference. First operand has 157 places, 138 transitions, 1297 flow. Second operand 49 states and 3319 transitions. [2023-11-19 08:02:06,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 330 transitions, 3158 flow [2023-11-19 08:02:06,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 330 transitions, 2882 flow, removed 35 selfloop flow, removed 28 redundant places. [2023-11-19 08:02:06,864 INFO L231 Difference]: Finished difference. Result has 190 places, 199 transitions, 2148 flow [2023-11-19 08:02:06,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=2148, PETRI_PLACES=190, PETRI_TRANSITIONS=199} [2023-11-19 08:02:06,865 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 170 predicate places. [2023-11-19 08:02:06,865 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 199 transitions, 2148 flow [2023-11-19 08:02:06,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 64.76) internal successors, (1619), 25 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:06,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:06,866 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:06,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:07,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 08:02:07,085 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:02:07,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:07,086 INFO L85 PathProgramCache]: Analyzing trace with hash 2010544026, now seen corresponding path program 14 times [2023-11-19 08:02:07,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:07,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373896159] [2023-11-19 08:02:07,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:07,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:07,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:07,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373896159] [2023-11-19 08:02:07,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373896159] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:07,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691405028] [2023-11-19 08:02:07,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:02:07,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:07,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:07,415 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:07,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 08:02:07,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:02:07,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:02:07,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 08:02:07,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:07,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:08,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691405028] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:08,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:02:08,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-19 08:02:08,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191049231] [2023-11-19 08:02:08,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:08,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 08:02:08,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:08,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 08:02:08,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-11-19 08:02:08,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-11-19 08:02:08,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 199 transitions, 2148 flow. Second operand has 25 states, 25 states have (on average 64.76) internal successors, (1619), 25 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:08,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:08,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-11-19 08:02:08,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:09,897 INFO L124 PetriNetUnfolderBase]: 572/1166 cut-off events. [2023-11-19 08:02:09,898 INFO L125 PetriNetUnfolderBase]: For 9400/9400 co-relation queries the response was YES. [2023-11-19 08:02:09,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6609 conditions, 1166 events. 572/1166 cut-off events. For 9400/9400 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6883 event pairs, 82 based on Foata normal form. 3/1169 useless extension candidates. Maximal degree in co-relation 6442. Up to 794 conditions per place. [2023-11-19 08:02:09,917 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 189 selfloop transitions, 108 changer transitions 15/312 dead transitions. [2023-11-19 08:02:09,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 312 transitions, 3523 flow [2023-11-19 08:02:09,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-19 08:02:09,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-19 08:02:09,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2172 transitions. [2023-11-19 08:02:09,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41641104294478526 [2023-11-19 08:02:09,923 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2172 transitions. [2023-11-19 08:02:09,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2172 transitions. [2023-11-19 08:02:09,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:09,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2172 transitions. [2023-11-19 08:02:09,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 67.875) internal successors, (2172), 32 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:09,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 163.0) internal successors, (5379), 33 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:09,939 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 163.0) internal successors, (5379), 33 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:09,939 INFO L175 Difference]: Start difference. First operand has 190 places, 199 transitions, 2148 flow. Second operand 32 states and 2172 transitions. [2023-11-19 08:02:09,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 312 transitions, 3523 flow [2023-11-19 08:02:10,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 312 transitions, 3031 flow, removed 213 selfloop flow, removed 19 redundant places. [2023-11-19 08:02:10,028 INFO L231 Difference]: Finished difference. Result has 209 places, 231 transitions, 2443 flow [2023-11-19 08:02:10,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=1738, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2443, PETRI_PLACES=209, PETRI_TRANSITIONS=231} [2023-11-19 08:02:10,030 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 189 predicate places. [2023-11-19 08:02:10,030 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 231 transitions, 2443 flow [2023-11-19 08:02:10,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 64.76) internal successors, (1619), 25 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:10,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:10,031 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:10,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:10,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 08:02:10,245 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:02:10,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:10,246 INFO L85 PathProgramCache]: Analyzing trace with hash 411724166, now seen corresponding path program 15 times [2023-11-19 08:02:10,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:10,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465488569] [2023-11-19 08:02:10,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:10,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:10,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:10,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:10,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465488569] [2023-11-19 08:02:10,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465488569] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:10,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207051117] [2023-11-19 08:02:10,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:02:10,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:10,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:10,482 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:10,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da90ea6a-0115-4f73-a1b6-9db3480ddb27/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-19 08:02:10,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 08:02:10,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:02:10,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 08:02:10,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:10,828 INFO L327 TraceCheckSpWp]: Computing backward predicates...